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arXiv 0704.3714cond-mat.supr-con
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两相超导体specific heat中的第二不连续性

Second discontinuity in the specific heat of two-phase superconductors

E. Di Grezia, S. Esposito, G. Salesi

摘要:

通过引入两个不同的标量场描述的序参量,进一步分析了最近提出的具有两个不同超导相和临界温度的超导体理论模型.我们发现一些偏离的基本物理量相对于金兹伯格-朗道单相超导体。特别是,与通常情况下比热只有一次跃变的情况相反,我们实际上预言了C_V在从一个超导相过渡到另一个超导相时会有一个额外的不连续性。

英文摘要:

The recently proposed theoretical model of superconductors endowed with two distinct superconducting phases and critical temperatures is further analyzed by introducing two distinct order parameters, described by two scalar fields which condensate at different temperatures. We find some deviations in basic thermodynamical quantities with respect to the Ginzburg-Landau one-phase superconductors. In particular, by contrast to the usual case where only one jump in specific heat takes place at the normal-superconductor transition temperature, we actually predict an additional discontinuity for C_V when passing from a superconducting phase to the other one.

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